State Responsibility and Comparative State Liability for Administrative and Legislative Harm to Economic Interests, in: Stephan Schill (ed.), International Investment Law and Comparative Public Law (Oxford University Press, Oxford 2010) 377-411.

Brief Overview over National Authorization Mechanisms in Implementation of the UN International Space Treaties (together with Florian Hafner), in: Frans von der Dunk (ed.), National Space Legislation in Europe: Issues of Authorisation of Private Space Activities in the Light of Developments in European Space Cooperation (Brill, Sydney 2011) 29-71.

The Importance of Guidelines and Codes of Conduct for Liability of States and Private Actors, in: Irmgard Marboe (ed.), Soft Law in Outer Space. The Function of Non-binding Norms in International Space Law (Böhlau, Vienna 2012) 119-144.

National Space Legislation – The Work of the Legal Subcommittee of UNCOPUOS 2008-2011, in: International Institute of Space Law (ed.), Proceedings of the International Institute of Space Law (Eleven International Publishing, The Hague 2011) 101-106.

Austrian Federal Law on the Authorisation of Space Activities and the Establishment of a National Registry (Austrian Outer Space Act), in: International Institute of Space Law (ed.), Proceedings of the International Institute of Space Law (Eleven International Publishing, The Hague 2011) 530-537.

The New Austrian Outer Space Act, in: 60 German Journal of Air and Space Law (2012) 1-36.

Contracts between States and Foreign Private Law Persons. together with August Reinisch, in: Rüdiger Wolfrum (ed.), Max Planck Encycopledia of Public International Law (Oxford University Press, Oxford, 2012) 758-766.